OPERMIOR: _epgeg untoaiee SSRSSSEP Ea shift:_y shifts/day; x nen/day

THOR - Roo 203 -
. Tine Time Noe Concentration Avg Con'c.#
Overation Per {Opera.! Per of [a3 Times
or Opera.| Per Shift Samp-| Total Time
Operating Area (min) [Shift |{min){T) [les } Low High Avr (T¥C)

wigiete ati 30 gale :
enias wié | w | 3 ]® © 7]

Thorius extraction : .
Boo: 209 - - 8 & je 7 9 | Se

Ganchrose. - -

$
t
4
°
+

i :
1

# Adjusted to two
signifisant figures, Zitxc) BrP
- 3 Times the Maximm =|
(TxXc) = 7,9. af __Allowable Concen-
= tration. !

2 (T)

USA 012543



OPERATOR: FuFeman &_non/shitt; Be shitts/iay; 2 nen/ioy - a

‘ssoket _ Seer tao METAL CASTING .
Time Time Noe Concentration T Avg Conic. * —
Operation Per Opera. fad Times :
or Operas} Per pete c fotal Time
Operating Area (min) [shire is low High Ave | (PX) _
tingroos - [- | wo f6 fo 1s 6 | 7,60
GAs Lunch room - | « @ |t |& RM B | 1,60 .
. . . 7

- *Adjusted to” to -
Significant figures. - =t 7:

=: ae ooo

° Times thé -Maximm
Allowable Concen-

AE a aa os

USA 012564



’ ,
_ OPERATOR: perce apmen/shifts, 4 shifts aay; A nen/iay
Tine [No. Concent ation Avg Conte, * :
Operation Per Opera. gq Times
or . Operae] Per ~ c Total Time
Operating Area (min) |shitt “}(iin)(T)} 10s [tow High Ave | (7 x¢)
Removes furncoes 20
Soult arers, .
cover tube with seatet, @ | 3 é 3/0 = tn
Removes qnarts
Graphite and . . n
bi 7 30} 3 ¥ 2j]e0 .- 6 e
Bewsves quarts immer |
tube graphite, Blovs|
off furnace 27 3 8 2 {0 tod 8 9
Ealloading Furnses in
, Xn
furnané ine
Motel casting 3.7 3 BES 2;¢@ -» 86 )
Clean off furnace par} .
Brick inwulation | izs| 3 2 hr 309 a | 23,100 ;
Loading Crade Biscuit,
{et ceaincine
beater: pots that hotdp : \ .
csuds biscuit 29] 3 8&5 | 2 [0 « e @ i
a9 a3
X(t xc) USA 012560



Room
303

Safe ()
Dryer Oven Sink :
Trays | {6000}
foes m
are) matte
Table
or . Ww
Desk : @
2)
BO ars
J Ventilated Hood 3720,
cok aa
2
: "
Oo ~ G.A. Thorium ~
ROOM 307 £5 - G.A. Theron
{ll - Breathing Zone
ES)
B
= 12, 000
. . Tank
Furnace Furnace Furnace ‘ tray
No.l Noo? | | Woe3 . Table
Neutralizer
®@ Ww
© S) @
Recorder
*
N
SEGREF
Figs 5 ’

USA 012537



j C
==>

OPERATOR: BONS LOAcERs B nen/stitt; & shifts/dey; 2 nen/day
THEM.
. Time Time Hoe Concentration tAvg Con'c.#
Oneration. Per Opera.|} Per of 2. pr Times
. or Opera.jPer | Shift Samp-| ~~ Sy | Total Tine
Operating Area (nin) Shift (win)(T) | les Low High Ave (T XC)
“ é .
with Sehh and :
Gal chart 6 |] @ Js [emo so san] 2,00
Transporting bos -
ee topping area, top, . -
- adds $e pley : . _— ‘
Hineo ona seals bor | § | 0 | 50 3 | 9 S20 M30] 196,50
” ares" - - & 21/39 MD 395, U,RO
‘A+ Boom 33 :
(Thorton Cruds) « . mo uw G tO 95; 9,50
Luh -=j«*/] @ }|2] @ «+ oF 9

# Adjusted to two

significant figures. HT xc) 460,000

- ; 3 oS" Times the Maximum
y hes) = Bsa Ga'r’=s 32 __Allowable Concen-

rT) . ‘tration. t

USA 012547



“OPERATOR: _ S460 UHLOADER 2 nen/shitty 2 shifts/day; -Lnen/day
THR
Desexes
Time Aine a r=, Concentration tAvg Conte.#

Oneration Per t _ |_ Times
_ or Opera. Shift | Samp- CY j Total Time
Operating Area (win) [Shift | (min)(t) [es | Low High fve | (? ¥ c)
TMseberging Th oxylate .
Wth RX gals cdrom pe] 6 a 3 }3 6 ma 37,H0
‘hortam extractions 720 =| « B88; 8 | 6 «65 As] T,ho
tanekroon “~[~* | @ |elm sm 8] 2,65

# Adjusted to two :
significant figures. 2T *s _ Zit xc) D0,to
a Times the Maxim
(TX) = ooo = 2.9 __Allovable Concen-
= = (8) oa ‘tration,

TSELIHED aanghtor= 22,000 afa/e? at sated thom of exrvay

USA 012585



Operation : Avge Concentration (d/n/m) Yo of
Thorium Thoren . Samples

renelt areas. Secures

cover tube with sealer - 0 Cs) 3
L Heesdiedh erieahein anal

top, graphite &

vaowuns furnece 6 3,500 2

Se Removes quarts inner tube
grephite, Blovs eff fure
nace Q . 3,000 2

6. Unlosding furnace insula-
tion & thorium metal
casting 0 26,000 2

7. Cleaning off furnace parts . \
brick insulation 250 76,500 2

8, Cleaning out inside fur-
nace cover tube with .
scraper,brush & air hose @ ° 2

9 Cleaning graphite heater
pots that hold erude tis-
ent r) 17,000 2

10, Loeding 2 crude biseuite . 4
. inte pots, place inela= . !
tion brick

around pots,
plass quarts tubes on Sure
nace. Air hoses. I 1,600 2
Machining
1. Milling or cropping thori: -
metal ye ie TM np 6,203

USA 012528



re ane

r
RATOR: _essting ond Desincing— 3__men/shift; 2 shifts/day; % men/day
Qperatore (contincsd)} .
~ Time Time Noe Concentration ~ TAvg Con'c.*
Operation Per {Opera.} Per of _ mf Times
or Opera.{Per | Shift | Seup-pore C) | Total Time
Operating Area (min) | Shift : fitow High Ave } (T¥C)
3
Jamh ~ [= | @ | 8] -@ © 8 o.
. - XS iy
- POY
- }
i
i
if
it
: f
: i
% Adjusted to two ;
significant figures. oT mp ZT x C) 35,008
_ : 3 Times the Maximun
: gy EXO) = 8 afal= Ooh Allowable Concen-

ET) ~ tration.
: USA 012558



OPERATOR: _ Barking and Jotéing x ren/shifts_y shifts/day:_y nen/day
PHORT He Crade . SPP ss=

Time HO. Concentration lave Con'c.*
Operation Per | Opera.| Per of _ Times
or ‘ Opera.jPer | Shift Sarp-| C Total Time
Operating Area (min) {Shift | (min)(T) [les | Low High Ave | (7% ¢)
Line pooking and
temping ares «|= mie » BH S| UM
fotting ates «|. wo 2 | ie Be ows | tio
Janeh Ares ~ « & [2 «“ * a ®
% Adjusted to tw '
sig 4 figure: £14 ax
_Sienificart figures. ZT fe Dit xc) 375208
ven X See Times the Maximum
(IX¢) = ‘2 G.99-——Slowable Concen-
»” “FSi —_——_—___ a . ‘tration. :

USA 012544



Co. ¢

OPERATOR:  Shoxdues Peteaskion 2 men/shift; % shifts/day; % men/day

; Yeading Gperstor Sie
Tine 4 Time Now Concentration Avg Con'c.#
Oneration Per | Opera.| Per of _. ind Times
or Opera.j Per Shift Samp- (y Total Time
Operating Area (min) {Shift { (min)(T) | les low Hieh Avg (t ¥ ¢)
Pa arian of til rH : :
hopper 2 | 4 zw | 3°] 9 mod 270) 2000
Loads ap correct fo :
at into 3 axsli aa] 6 Ms | 3 [axe 609 3000) hz, 000
traps Cartons . .
TSP inte tank 2 6 6 2 o - 9 -
Ged. Thorins extractiay
(Room 203) - * is | BU oo. 6m | neo
Hallway (Corridcr} * - xo) 8 “+ »
Lonch (Seuinar Boon) * - & | 2 - - -

# Adjusted to two

significant figures, oT a aoe ZT xC) yo
BD dens thot

Times the Maximum

. 3
(TXC) = <<a Ts 9h Allowable Concen-
= ofa! : tration. |

USA 012550

= (T)



id .
OPERATOR: feresun "2 _nen/siifts 2 shifts/day: 2 men/dey
reo fhoriim Metal Cavking
Time Time Now Concentration TAyg Contc.#
Oneration Per Opera.| Per of _ Times
or Opére.jPer | Shift Sarp- CY | Total Time
Operating Area (min) {Shift | (min)(T) [les Low High  fve ( XC}
S.Ae. Thorium netal :
Gasting rosa a le ea] 6 ¢ ¥ #& - hae
Oak, Lanch sven ~ | O@; Fe] @ © Oo 8

# Adjusted to two ‘ :
significant, figures. ST ae Exc) bee

Times the Maximum

y Xo) = ——0.82.____ dfs / Fa 2.23 Allowable Concen-

tration,

SECRET — USA ot28

2(T)



OPERATOR: HalfeSine Desinsing 8 nen/shift; 2 shitts/tay; , 3 men/aey

Shontet :

. z Time No. | Concentration | Avg Conc, =”
Operation Per Opera. | Per of ofan? Tims |

or > Opera.| Per” [Shirt Samp- C. Total Time

“Operating Area (min) [shirt [(in)(T)hles-—feew High & (2X ¢)
= 1
“Brloating desinced ¥ k :

Air Heaes mit. | 95, 3 | a5 13 |o = © 6 -

Adjusted to two
- Significant figures, ~

at

Elexc)

* , Times thé Maximm
Allowable Concen~
[os ., mation.

cS
a
>
°
=
nN
a
a
oc

¥ (2xc)
Beers



APPENDIX A

USA 012541



a WEICUTED AVERAGE EXPOSURE _(0AC)

Occupation 0 220 2.0 5.0

Eimco
Unloader

| Extraction ee)
Ioader Operator -”

x x
nn 5 mice 3
HF Operators —s 3

Zé —_
Foreman, 7 1 5
Thorium Crude } :

-Bomb Unloaders 4 . - 2
J Cio
Bomb Loaders ed . , \

Packing and “ya

Jolting 2
) CEI 1
[ teseh Ye i ,
’ | ote 1 Casting i

g
3 5
a ae
—— An
/ z. Or: 8
fhorios Mets al evs
[Operator H 8 d
S >
| FRorgam we fon . 3 Fi
i &
eH
g
8

nm oer = : 3 22
Total Personnel -_

[=

i a Fe 0)
Thrim ([——)

Ln we Thorn ma

“Sterner USA 012533 °

ee



$ C ~ - ¢

t z

OPERATOR: Gaabing sud Seatnsing —$ nen/snitt: & shifts/day; 3 men/day
ramtin :

Time “Time No. Concentration TAvg Contc.s
Operation Per | Opera. | P eS fan? | | Times
or . Opere.| Per Shift apt * TC); Total Time
Operating Area (min) [Shift | (min)(7) |2es Low High “Avg (T ¥ ¢)

| Blaceg top chortle) 75/ hb. | 30 |S | > m0 63] asa

: Places gar 2 tube
'. Sdde graphite between
quarts tube and
Places quarts cover tb
— 0% furnaces, Air hoses
unit : 95) & | BH 1S 1.8 ® 9
Renoves furnaces to
Pemelt orexd, Secures
cover tube with pealer | 3 & 8 3 o Qo 2
% Adjusted to ‘two
significant figures. £T Etxc)
Times the Meximm
ytEXe) = Ofa/ns Allowable Concen-
= (T) ‘tration, L.

Saar USA 012556



C

OPERATOR: Th Mfing Opetatar 2-_men/shitt;_X shifts/day; 2 men/day
byes
. Time — [et ntration Avg Con'e.#
Operation Per | Oper Lore fr i. Wa fe | Times
or Opera.|Per [Shift | Samp-| (Ey | Total Tine
Operating Area (min) [Shift | (min)(T) |les | Low High Ave (Tt ¥ c)
Milling or Cropping
Thoriua pieces * * be a ao 19 | 33,200
Bidse Room £2 - * &@ }3 |e » 6] 4
Lunch (Seciasr Boom) | « . & 2/6 « a; 6
# Adjusted to twa Eo) 33,200
significant figures. aT Rll xc)
Times the Maxima

y tt chs s
pags)

A the e

Allowable Concen-

ion.

USA 012553



a

Thorten Ex- General, Ekgd, Radiation

tréction (Room) ° OL 0035
(au 203) a
‘THT Weigh Seale 3h,000 O06 ra)
TNT Deron Storage Area
. Sop Drum 2,000 o 15.0
Side Drom 3,000 15 22.0
Floor 5,000 9 2.0
TEP Load Bopper (on THT) G00 6 wu
Floor pgced ° 0695
ae TRE Tank #1 (Zupty)
Inside ° 003 O05
Outside - ) ° °
TRE Tonk #1 (Full)
Inside 9 1.0 6.0
Outside ° a 5.5
Step in front ef 3 Slurry ‘
Tanks 32,000 Ol 0.6
. ‘Bimco Filter (ThOx) material 50,000 25 LS
Selim tiizmifmii’ o io “bs
5S gal. Drum Thox Full 50,000 $.0 . 7.0
Filter Press
Top 3,000 ° Od
Bide : 3,000 0.8 0.7
Process Floor
Aves Reading at Filter . .
Press, Einco & Slurry a
Tank Areas 34,000 O2 0.75
Work Bench 3,000 0.05 Od
Sink , 165

Some
a 2620 & Juno used for all measurementd & i
Pot Be U2EDS E mocts for Tanks #2 and #3

USA 012530



TABULATION OF AVERAGE GENERAL AYP SAMPLES © AMES ©

. Avg. Concentration d/u/u3 ide of
Location Thoriun Shoren -__Sarples
Thorius ,
Extraction Area (Rn. 203) 9 27,500 8
Drying & Calcining Area
{Rm 303) 2780 2,700 &
Bydroflagrinet ton Area mM ° 5
‘Thorius Crade Area (Ra 33) 95 3,600 n
Bomb Storage Area (Rx 33) 195 8,500 2
Metal Casting Room (Ru 29) = 2 1,600 6
“Bast Control Panel (7m 29) 0 600 2
West Control Panel (Rn 29) 0 70 2
Parmage Cleanbit Aree ° 6,800 ;
Cofridor outside Rm 203 0 1,h00 2
Seainar Room (Lunch Area) t) 2,800 2
d@olting Area (Ru 33) xB 3,300 . 2
Line Packing & Taxping ,
Area (fim 33) 198 8,500 2
Beryliin
"een Oe etm Oh ug/e? . ?



im
ws

b ssleentanl

OPERATOR: Drying Operater 2 men/enitts U shitts/aay; % nen/éay
THORTUMe BOON 903
1 Time Now Concentration {7 Avg Contec. *
Operation Per Opéra. } Per or gq Times
or Operas} Per Shift {Samp- : c Totel Time
Operating Area (min) |snitt | (win)(T)}ies [Low High Avg (t XC)

Balosd Drving Furnats ' ,
& small trays :
fron dryer to Toads blot.

and duped (Zh0x) 2 » 2 | 3 | 62 e400 2770) 35,000
asds .
‘trays for calcining { 3,6] 6 | 3 jat00 2300 2730] “sky6000

soaveys
Uwloads 2 trays fron

dryer to ioad hood md .
eaped 2 é 2 3 | 620 200 1770] 21,200
Sweeps up ThOx ond ‘

Thog in hood using

breom and vacum

cleanse 35] 2 | -7 | 2 [doco ~ bono | 28,000
OAs Boon 303 >| = | 3 | & | 0° 3200-2800 | 682,000
Lunch (Sexinar Roon) - - & 2,0 = 0 °

"Adjusted to two

epazl0 VSN

- significant figures. xT 0 Sccomree xc) Bx9,000
2 .
Times the Maximm

XC) _ __ 350 he 2 - ‘Mlowable Concen~
2-30) We —— tration.



th. Metal ‘Average Desinced Billet

Reduction & Botton — 35 38
Casting Top .- —_— Off Seale 20.5
: Side _ 2.5 5.0
Average Cast Billet (Fresh)
Botton sanee 1.0 5.0
- Weddle www 1.0. b.o
top . —e 6.0 70 .
Average Cast Biliet (20
bre 014)
Betton ed 4.0 &eO
Widdle wee 3.0 2.0
Top . some 1.0 35
Generator General Room Bigd. one Qo 0.3
‘Thorium Mach- Finished Billet Storage
dining Shop
ar) Boxes (utiaets) Lvk old
(Contact) ed 209 16
End (Contact) — ° td
Length (6") se 2.0 9.0
(er 2 omen ° 7.0
2") wnwa00 2.0 65
od (1') acne tC) 4.0
ao 12 Boxes. (billets) 3 us :
Length (Contest) — 1.0 Off Seale
Had (Contest) _ 1.0 2b
Length 6") - —— 21.6 BY
End (6", » —_— ee oe
Langth ee : o
md On — 2.0 6.5
Corridor Floor between Crode & Metal
Machining {after washing) 15,000 OS 0.05
Steps to Locker 3,000 _ _—

ST A ee 8

USA 012532



—
Saen=T
~

OPERATOR: _ Som Untoaters 2 nen/shifts_¥ shifts/day; ® nen/aay
HORTON .
” . Tine Time To. Concengation ‘Avg conte. *
Operation Per Opera. } Per of afn/; Times ,
or Operas} Per Shitt Samp- (7 Total Time ee
Operating Area (min) [shift | (iin)(t)| les [tow Bigh Avg {t Xx ¢)
Opening 2 bend and
unloading line from .
top of bab 25 3 3 |o « e 9
Drilling out crosihie .
fran dosh ‘37 37° Sr) uo] MS
Tam ani dump slag
froa bead 309 x» | 3]o - oo 8
* Ghipping aleg from
yand chise), 2.7 - 7 3: ];o « 9 )
Removes slag with siz]
_humer . 3 1 xn 3 - 6
. Clean up | 2 3] 6 - eo]
GeAe Room 33-Phariun
crude - - [2 [a ip 95 | 3,000
Lanch - - a 2 . 0 o
/
SST to two a
significant figures, =? “Siena x CMthy000
: - es tines ‘tie Maxine
T XC) tt he = 0.63 : - - Allowable Concen~

an
_ 2" EG)

. tration.

- eisei0 vsn



he Amboy
a a

. *.

TABULATION oF AVERAGE BREATHING ZONE SAMPLES © AMES
Avg. Concentration (e/a) Ho. of
Operation ron. Sasples
Thorium Extractian
1. Unloading 190 Fibre Pek

carton of TNT in hopper 170 46,000 3
2. loads up correct weight .

‘TW? in 3 small cartons 3000 73,000 3
3. Dawe Cartons containing

TW? into tack ° 15,000 2
kh. Discharging thorium Ox-

Ylate inte 30 gel. druzs 7. 52,000 3

Thorius Caleination & Eydrofluorination

2. Wosding (1) trey(s) thoriun
oxylate {in heod) from 30
gale drum (outside booed) &
conveying to drier 250 ° &

2, Unloeding 2 trays from
drier, conveying to hood
& duping trays . irre : 10,006 3

3. Yoatling thorinun oxylate
eining 1730 7,000 3
k, ‘Transporting therius Oxy-

late trays from load hood
to storage aroa o 25,000 2

cleaner o 1
6. Unloading calcining fur-
: nace removing & trays
thorium oxide 100,000 2

USA 012524



CARTS SET UP & TORN DOWN FOR INGOTS |

& COOLING LINE
ROOM 22
Work Cabinet
Hood Hood - Bench Work Bench
Pott rne theses nano enna ~~~ 1 .
‘ 1
1 ‘
t 4
H Area of Tearing Down and 4 Milling
| Rebuilding Carts = Pote, Yachine
' :
‘ Ete. H
H H
' i
! wl} t
t ~ t
J

' 1 ~~ Entrance
1 1
Vacuur i Cart Area {
Pump I i
Cooling Line
G- Breathing Zone
Fig. 3
= Po een
USA 012535

ane?



FINISHINO ROOM 15 Stcre>
r--" work Bench .
H
‘ Pre!
Stor~, 8B
e
of oh Area . .
Unusi > {S10} ‘
Cans | - {Ei0} . .
1 =
' :
H :
---—!
Entrance
were trate ree 1
Temporary Storage !
of H
Finished Billets Hl Table
L
50 KW Gen.Rn.
50 KW GENERATOR: ROOM-& STORAGE
Storage of Cans. i IN Open cabingt
_— Th Scrap, Saw Filings, I Cabinet
N etc. !
N 1
“We ee eee a
Safe prcccc cr 4
' Storage of 4
° } Cans |
Bench & 1 Crude& Dew | oC ’
Cabinet - Wei gh| | zinced Biscuitd 50 Kw /
Scale to i GENERAT
“ Casting
G.A. Thorium .
samy corm, oem

Q- Breathing Zone

fe. G.4, Thoron



-OPERATOR: Bom Bnitgndacss

Y

@_nen/shift; 2 shifts/day; p men/day

sano
- Time Time Ho. Concentration ~ TAvg Con’c,#

Operation Per [Opera.|Pepeg. {of ay, /r? _{. Times |

, or Opere.| Per Sku : . CG) {Total Time

Operating Area. {(min) | Shift | tnin) 7 High Ave | (? ¥ c)
Opening 2 bob end uted) | | ;
dng Zine fron top of borb | 2,5] 39 Bw) sie «& Cr)
Brilting out cratitie :
bea RT] v7 | 318. * eo; 38
fag ant Gap slag fron
‘howk 3.9| 30 2» 3 |e 6 8
Chipping slag from billet . .
wath hameer snd ohisel Rt} 71 3 ¢ 1 5 | 8
Renaves dlag with air : | - 4.
Danger 3 pi) n 3/0) a e
Cleat wy 8 3 é 3/0 « r) r)
Gobs Boot 330 Thorton |
arads Oe = jo sh a
lanch * * Oo; <ih BR 8 | 2,66

Adjusted to ty .
* significant figures. £T ae a Riarxc) Ty.
VrSrey, Times the Maximum
(TxXe) « e: Yay Sh Allowatle Concent
= — ‘tration.

USA 012567


ef
OPERATOR? HP opanations {Ganbtmed} — men/shift;__ ‘shifts/day:___men/day
Time Time Noy Concentration Avg Contc.# :
Oneration Per | Opera,| Per. of ne. Times
. or . ,[Opera.{Per [Shift | Samp-} C) | Total Time 1
Overating Area (min) | Shift | (min)(T) |les low High ve (ty c)
| Boek Tish, Sake F gate . Sacre
| Yéuea setha; wnt nd _
cover) HA] WR] 13 | 8 [xe Bote | ON
Unlesic i dewof . 55 .
hag in tangs heod 1; 3 3 | 8 [eo OD To |: athe
Tonding h trays sith . _
Thy in danger hood | 9G) | 2 3 [Bio foop sep |; epeo
Weighing & trayes
making np weight snd

tranaporticg to
(open) area. 36] 9 xB 3 [mo 3900 2070 x0
Boe Egg | ge | 2 hoowe stemo ammo! ks

w) i | &o | 3 joo oes boo) lam

[!
i

_ furnace, Seal turece} S71 3 | a | 3 | 88am 2] | ade

nssco = 38800] stig

and dnp. as] 2 | $0 | 3
Gti, Als voce 397 @ 5 3 So & 50
Gan. Alx Boom 303 3 | & | soo gem om] aes
amoh (Seminar Boon} ~j<« |] @ Rie -« @ e
® Adjusted to t es
. signi fivant figures. gr me Bitxc) 1,680,000
. Times the Maxim
yi) = no ae Alloratle Goncen=
X(T) tration. t

USA 012555



i . C C

OPERS TOR: Bp opautoss Qnen/shift;s_% shifts/day;_y men/day

TROON oon 3 :
Time Tine Ho, Concentration Tyg Contos ~-
Qveration Per omen’ of a/m? Times
or Opere He “rsntret *Y samp.| — CY | Total Time
Operating Area (min) {Shift [(min)(T) [les | Low High Ave | (2 ¥c)

Golooding csicinins .
ieaye THO, 2 1 2 3 R . |Geo tooo Goer | tO
Sarncoee with bh tray ’ -

Saylete 2,9 ’ 2 [tre fm kiko | kS,200

2 toe

in hood (weigh qe ;
wad then camp in Sood) | 2 | 1B 13 @  [3$ee 23,000 10800 | 358,000
Galeading fomoce
qpening 3 & i & 2 | 2 8 3,080
Guloading 22 trays .
dm gota of h onto act -
sxaie carta 35 | 3 | wes | 3 . 1 829
Sransporting 12
an 3 bugzies fron i
Euucining voas for
dager } 29 | 2 6 2 | Mone 78 | hykko
Sweeps off sorting! .
tube with town aie 2 2 /2800. do 909 | 10,800
aadeces
Joading hood (umers :
beck af tray 3 | 2] _M | 3 [a0 sO 37a) | who

#* Adjusted to two

significant figures. ZT Titxc)
3 Times the Maximum
x (TxXC) = te [n= Allowable Concen-
. ¥ (7 ‘tration.

GeceeT
ee USA 012554

i
t



Thoriua Bx-  Gorridor Outside Th,

traction Extraction Room 5,000 0.02 0.12
a. {tm 203)
Caleining & General Bigd. Radiation
Hydrofiuorine- Roam ) Ps Se 3
on . .
Foor . 30,000 0,05 18
ThOg Tray (63 x 11 x 23)
Inside a 3.0 8.5
Outside ~—- ° 5.0
Tray (Fresh fro
Furdase) (12 x 2} x 30) .
Top _— 20 4,0
Botton —— 0.3 Pe)
fray {eooled for 17
Top —_—_ k 3.0
Bottom _— 0075 2.0
THOX Tray (6 x 11 x 23)
Top _— 2.0 65
Bottom —_— 0.1 3.0
_ . Thorium Crude General Room Bkgd. — 02
> (Room 33) . :
Floor around Mixer —- 6 1,0
Seale can,
Cover 0: bop Material 100,000 95 9.8
Gover on-Top material 2,000 0 ng *
ThF, Can Storage ; .
da = 7 see 2,000 o 22
Crude Billet a 200,000 beS 505
Crude Billet Storage dres
(Flow ) - 20,000 2.0 140

#08 Jano Contaminated.

1 USA 012531



SASSI . %._men/stift;_} shifts/day; L_men/dey
tro ee
Time Tate = MT tos“ “Concentration TAvg Con'c.#
Operation Per | Opera.| Ber of wn Times
or Opera.jPer | Shift Sanp-| Total Tine
Operating Area (min) [Shift |(min)(T) }les | Low High fve (TX ¢)
Orbe Wane Cqatrol Pinel, wmiile|- - oe]
jek, Th. Casting ston
fines E>) »1é)|o Ff 2] R
Janch (Seainar Boon} & 2 a « Q <2
. ! i
# Adjusted to two Ee) x
si ‘isant figures. LT Bitxc)

Times the Maximam

7 yhxs) = Le Allowable Concen-
: = (7) SS OS es ‘tration.

USA 012545



E ore stern Set anda 2 sts /enys 3 neo/iny

‘Tims . ‘ime Boe Concentration Avg Contco. *
Per Opera. [Per - fot in Times

Operas} Por Shift Sanp- } Total Time
(min) |shitt | (iiin)(T)[t0s  |tow  Bigh Ave | (1 x0)

2 {9 | 9» | 3] 0 m0 wo! amo -.
2yl00

36 ].6 | @ | 3] 0 mw 7

. y
35 2 7 a a « 0 8
~- | -] 39 lato - 6 6
- - & 2;& xn 38 2,250 >
USA 012562
*Adjusted tH .
-. signi?icent Aevres. =t SO

. Swine a
. PACES) EO: «EEE, 7
vee ial. ThoronDanghter= 200 dfa/a? at actosh time of sarvay*!o2:.. ;



: OPERATORs Packing and Setting A nen/snirt; 2 shirts/iay; 2 1 men/any _
"qyooite rade . ae:
‘Time yi Pim oie c pyetion Avg Contc, * o
Operation Per Opera. Peres tre Eid/n/ Times .
or Opera.| Por Shift |Semp- c Total Time \
Operating Area, (win) shift [(iin)(t)f1es tow High Ave | (1 XC)
ome area = ete 3 2], 2% & 33] 11,90
doting area 2 f= | 20 | & | & 9. 8] 20,80 .
Lanch Ares e]e & mm MR 28) 1,660 van
i, ted to two —— :
signifieent figures, =: Pe ert eevee 2 (2 XC) 2,80 USA 012563
abe -Pimes thé Meximm |
2229) my fe - B63. Allowable Concen-.
BO psi Theron Danghtax 4300 ele at acta. ite 2



C C

OPERATOR: Firanact Crude Dente 2% _men/shift; 2 ‘shifts/day;% _men/day

‘PECRIUE
Tine Ti entration Avg Con'c,#
Operation Per | Opera, | Pe fm Times
or Opere.|Per | Shift mn Total Time
Operating Area (min) | Shift | (min)(T) [les Low High Ave (t XC)
arene Hoon 33 * * 8& Rn a ae 9S 18,609
fanch feos « le r 2) 9 =~ 8] ¢
: ‘
# Adjusted to two -
significant figures. ZT oO Sse ZT x C) B5_609
- Times the Maximum =
(7X6) = fa [= Pra Goncen—
E paey) an a tration.

USA 012551



TABIZ 12 (Cont'd) ‘

Caria
Mee tae Next Kime B

8 Avg. Concentration (d/a/¥3) _
Operntion VE en on

Thorius

Wo. of
Saxples

9

10.

3.

5.
1

Taping & dumping
aieg from bond 6 tC)
Chipping sleg frou
belles with hammer
& chisel 8 5,000

air hammer a) a

area 220 80,000

Chips 2 billets & blow -
eff dust with air hese = 0 ry

Loading be_Desinced Riliste
Taserting 2 dexinced
billets into Be eruci-~

ble, edds thorium screp

and places top on crue

sible : 663 20,300

USA 012527



=
a

OPERATOR: SORE HAN -dren/shift; 3 shifts/day; y_men/day

pie 9) i
y ~ Time SRST concent ‘tion  tAvg Con'c.#

Oneration Per’. | Cuesay} Pepe? Saye: Times

_ or Opera.|?er | Shift Samp-} TY | Total Time

Operating Area (min) | 323f¢ | (min)(T) des Low High ftw (@ ¥C)
during te § ody eran |
Tai, date grinder | a | ) 3 | 3 lime sax 23,000
Yeh. enn Pa) Ss {3} e « a} 6
Lasting mizev with 22025 i .
Toh, and cari charger a,b & | 3 fo m0 iio] bya
CaP Soom miner aaS | 30 3 | 3 | 8 moO = 3800! 29,500
atuie) - . i inlo % 56 (Uy
tino ele ff | 2)% m2 8 | 2,60

% Adjusted to two rm pe Fea : .
significant figures. 2°) SSSRE Fs 1: x 093,50

Times the Maximum

c) . he Alloweble Coneen-
es one 7 +73 , fa / tration. onsen
Tnitdel Thanos Dyaghteas 29,000 da/eP et acta) tine ofa way

an Le =

USA 012568



THORIUM EXTRACTION

ROOM 203
|
| Sg
Toading {1176} . Desk
Ho} : Aeid
BR )
Scale 5000 actor ,
OC . we
Piltrate []
C): Slurry 1 eek Drona mm
; Tanks Rieer ©, oC S54
1 Drum _Drye: e) 0996
6 Coxe
5} 30 gal. drum SRS: oO
@ 5 fo) ro) 0.0 Hood
@ , - 6 aoa
Filter Pres _ © onige tele
(270) ®@ Work Bench. @
ol 4 Fr fa
CO - 6.4. Thoron
6) - GA, Thorium
{]- Breathing Zone Figo 6

USA 012538



Oo = Bk. Thorium
Cl- G.A, Thoron

: {i- Breathing Zone THORIUM CRUDE SECRET
S i L

Wash Basin
{Fj Cleaning Table Fable
for Crude Biscuits
y - 8
dolter for{x[X] Jolters for ©
Knocking Packing Liners
Out Biseust acibles eset x
slag Pits - 38 ge Charge
cy {oj Air Han- ces J waxer[" |
” mer for. . Say ms 7
> Cutting Down ee app
@ {Gj liners BS aa cesar
Fill Table

4 Crucibles| o
©) Slag Barrel Gop G85
ae

mo . in Floor Furmace °
; L
oot ; Room bS
WwW _ -
ing : @ +
Rack .
abov : Desk
Floor
USA 012540



20.

.t

2.

3.

be Unloading

6

%

Dumping 1 Sagal. dren of
thoriun fluoride into grider LL00

Emptying hopper inte 30
gels drum S

Leading mixer with sinc
eblorids, thoriun fluor”
ide & calcium fluoride
ebarge

Loading toxb-liner with
THY, 20 Ch and CaFh charge 5200

Transporting bemb to top-
Ping area, top, add

graphite Tinea &
Lax gl canal ° 2230

Opentig 1 boab and um
Yeading line fron top of

bomb 6
Drilling out emeible fron
bea -

1

235,000

ui9 000

180,000

100,000

130,000

159,000

80,000

20,000

: USA 012526



OPERATOR: Holcetinn deninging 3 nen/snirt; 2 BR shirts /aays , $ men/iay
operators (oontinaed 3

Operating Ares

Time

Avg Gon'c, *

Per Opera,
Operas} Per~
(min) {shire

Gens Ade Room 29
(thartua casting)

"Ge East Pane Board |

SEdjusted to ro
significant figures,

; 2 ae -

No. Conc Sree
of y ..
—

Low _. High Ave

Total Mme

°
°°

leszi0 ysn

fata

Times thé Sexi
J+ Allowable Concea-



C C

OPERATOR: wares way s= ern gs ets yshifts/day;_y men/day

—

‘TRAINS. CRUDE. - - ROK 33 :
Time Time HOe Geneon frgtion Tavg Con'c.#
Operation Per Cpera.| Per of Tt: Times
or Opere.jPer | Shift Samp~ —-ofa () | Total Time
Operating Area (min) [Shift {(min)(T) [les | Low High Ave (t ¥. C}

Pi ikea pela | 3 x | 33 | 3 [se sioo boo | 57,200
Eaptying hopper inte

Ral. due 4 Si/3]-e = 0 8
Tending aioes wit
ane” be sh | 9 |sro0 e500 p600-| 258,000
wet cart rromtiser® | 13 | 20 | 33. | 3 [2900 28,000 1h00 | 96,200
Sets Jom 25 (Reorte) TS} igs |u| 0 | ko 95] 3p,
Lanch ° “ & zi. - 9 0

S(T x 6) ksy,000

Times the Maximum
Allowable Concen-
tration.

USA 012549



hea eee TABLE IT (Cont'd)
vant ‘ead Keno Naas i Ne Kae

Avg. Gonsantration (4/a/¥3) Bo. of
Thorium Thoron__ Sarples

Cperstion

J. loading calcining fur
* nace with & treys thoriun :
oxylate B00 30,000 2

8 Unloading 2 trays thoriu:
oxide in hood (weighs
trays and then cimps in

hood) 10600 325,000 2
9. Unloading one drum thor~ . -
~ dum oxide in Large bood 7h50 360,000 2

10, Leading § trays with
. thoriux oxids in large .
hood seo0 317,000 3

TL. weighing 1 trays, making -
up weight and trans-

porting to open starsge .
area 2070 27,000 3
12, Levelling off thorics
oxide in 6 trays 22000 120,000 2
13. Sweeps wp thoriua oxide : r
and thorium oxylate 4000 ° i
ike 22 thoriua
oxide trays from ooole
tng aves (Benati) and
inserting trays in fur- :
‘nace. Sealing furnece. 232 _ 99h00 3 -
1S. Unloading h large trays ; .
thoriux oxide inte lerge ‘
hood. Weigh & dump. 16800 ° 1
WS. Unloading thorium fluor
ide furnace, Opening . :
3 furnaces. 270 33,000 1

17. Unloading 12 trays thoriun
finorice in sets of i onte
buggy carte — ris} 29,000 3

18, ‘Transporting 12 trays en
3 buggies from HF furnecs
room to caleining room for

eooling. ‘Unloading bugry. 730

USA 012525



C

C.

¢
e
oreritor: Casting ad Desinging 9 nen/shitt; % shifts/day;_} nen/day
THR ION
_ Time Time fo. Concentration Avg Con'o.¥*
Overation Per Opera.| Per ‘of Times ©
or Opera. Pi s Samp- c Total Time
Operating Area (min) sees Low High Ave (t % ¢)
Taloadting Casting
Ys rent top and
aphite
 -Yacume furnace 3a] hk a | 2 e « 6
: Removes quarts inner :
fornace RI} & n 2 oe « 9 9
Baloading Yarnsce Boo ‘
Unloading furnace tnmuled
casting BP] & . & 2 rs C) o
Clean off furnace parts,
brick insulaticn WS | | 8 [270 390 Bo | 17,
flem outside furnace
Gover tube with scrappery
brugh and aty. S2] & a 3 a oo. 6 @
291 & R 219° » ° 9
9 |h ¥ |tis 6B wl ek!
(Thorius casting) = |= | 3 16 io + 2! 2%
Adjusted to ty ,
* cignitivant figures. s te Latex cpaean.
- Times the Maximum
x (TXC) = ifn na Alloweie Concen=-
EC) TS tration. | :
c toe

USA 012557


a ?

OPERATOR? BO8S LGAERS : 2 nen/shift; 2 shiftts/day; & men/day
THe :
Time Time No. Conceptration TAvg Contc.#
Operation Per | Cpergpheten San? | Mmes
_ OF Opera,| Per Aet Baste PE Reed) ——~——7ay- | aotal Mme
Opcrating Area (min) {Shift | (min)(T) [les | Low High hve (t ¥C)
wading becblined wlth .
RR, » Eh and Cat cherge| 6 | | 6 | 3 | TO Im f0 | 48,000
"au
wopping area,
raphite plug, Aime and
onb. 2 A) 3 5 Me wm 5,000
jon Loed storage arse «je & zi& ~ & 5,100
Joke Roos 33 (rhorton
2 af* So RR eo ff BK) nw
tench aja & 2) & MN Bi 4,68
# Adjusted to twa : Sie ee .
significant figures. STkg ST xc) Panos
y 3 Times the Maximm
(TxX¢c) = : = Allowable ¢ -
aoe 390 fa ap. _s sie oneen

eitial, Theron Daughters 114000 Gaye? at abe actual tiie af carrey

USA 012568



C =@

OPER.ToR; ‘th Machining Qporstar 2 _mer/shift: 2 shifts/day; 2 nen/day
TAT

Time Tire Noe Concentration TAvg Conte,#
Onerdtion Per | Gpera,| 8 of Bfa/n _|_ Times
or Opera.j Per 3 TET | Total Time
Operating Area (min) [Shift | (min)(tT) VSs"] # tow High sve (TX c)
Saving Thorioa Biles |» | » | Mo | 3 fase sto mo | 2h9,000
Youth (Seniuar Hoos) |e |e ® |@*io « @} @
# Adjusted to two se ; 10,000
significart figures. ST Zitxc)
- : . Times the Maxim
zr (XC) s . 3 als Allowable. Concen- .
rt) —~ ‘tration.

SECRET . USA 012552. -



C C

eased wie £
CASTING AND DEZINCING ~ ROOM 29

To 50 KWGen, Rm

~ EVE
Control Teleyac. - :
Panel Vacuum
50 KW. GENERATO! cot1O Pump
L {20} ©  .
Entrance 1 Vacuum
. ~ Cod: Pump
ork ~ 0
Bench 7
fWwork Bench ©
. 1 Vace
, uum
{0}
Hood 5} ©
wa (sa) 3
Hood se ) {9 Vacuum A600

al O ea? wo Pump

fork {0} .
_ Bench. ' . . : Vacuum. fe)
co) @
OD
: Cap-
acitors

Entrance
@ - Aue: Rm

Control Panel for
100 KW Generator

O- Thorium 6.4,

OD - Thoron G.A. . Figgk  . .
Eo wee —— m9 Rammed 2
- Breathing Zone . wee PEE EF -

ine



oe

BERYLLIUM OPERATION

Os. as
. Rotap | Rood
(TT aa
0. x
| __|Globar &Y
Furnace
Leb
Table
ix] Dryer Work 'S)
- {i} Benck
x [PLT iimace
[itl] vazer
S) G0}
\
Room 32 Room 28

X<Inlets to Ducts

O ~ G.A. Thorium
LCo- G.A. Thoren
m- Breathing Zone

USA 012539